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Faint knocking noise in my car when i first accelerate. Please read below before answering.?

OK here is the problem.

I am somewhat mechanically inclined.. not much but a little.. I have had a

cv joint to go out. This doesn’t resemble that in any way. Turning will not

affect this noise. I just replaced the brakes last week… everything looks good

and tight. No loose bearings. Engine is very quite..No noise there.

Its not my engine. it runs very quite and smooth.

Could be my engine mounts but when I crank car and rev it up it doesn’t move

much and seems ok. No noise there that I can tell.

When I first take off in the morning about 5mph it sound like some knocks on

the side of my car about 4 or 5 times. It will not do it again usually until the

next morning. (so i thought) see below on how i finaly got it to duplicate.....

It sounds like its coming from the front right side (passenger side). Not

sure. I usually listen to radio on the way home so I only heard it in the

morning but now after research I realize its does it when I leave for home as

well.

Here is what I have narrowed down. I am hoping someone here has seen this before

or knows what I am talking about.

1. I thought it only happened when I left in the morning

2. I could drive from here to NC and it would not do it again...Nothing

3. If I drive down our road and would stop and start again.... Nothing

4. If i put the car in park and then move it to Drive and accelerate....Nothing

5. Put car in Neutral and stop and then move to drive and

accelerate....Nothing

6. Move car from reverse to Drive then takeoff....Nothing

7. Put car in park and let idle then take off…. Nothing

7. Pulled in to store and went shopping. When I left... It happened

again. 4 or 5 knocks

8. During drive home, stops signs, lights, etc....Nothing

9. Next morning leaving for work.... It happened again. 4 or 5 knocks

I have now figured out how to duplicate it each time. It doesn’t

matter if it’s cold or hot, in drive or reverse, turning or going straight,

accelerate easy or stomping it. It will only do it if I shut the car down and

then I crank the car and then when I go to take off it will do it again. It

will not do it again until I turn car off and then re-crank it.

Also please note: I drove down my road about 3 mph for about 300 yards.

Nothing...then when I slowly speed up to about 5 or 6.... It happened again. 4 or 5

knocks

HELP!!!!

Update:

2006 Avalon XL 108000 miles.

Update 2:

Hmmm... no it has the traditional struts/shocks

3 Answers

Relevance
  • 8 years ago
    Favorite Answer

    This might be a 'long shot' but when my car does this first thing in the morning it's because of one of the mounts on either the strutt or an A-arm. It will clunk like that first thing in the morning and once it's settled in, unless I change directions and make the car's body shift some it won't do it again until the next morning. Since it's not a big issue and my car's old, I just ignore it because I know all the body mounts are good and the suspension is fine otherwise. It's a start for looking for your problem and once you know which side the noise is coming from you can zero in on a fix.

  • 8 years ago

    have you tried just putting the car in neutral and seeing if it will knock without moving? if it knocks this would obviously indicate the engine is the issue and in which case you'd have to figure that out, usually knocking is from something in the oil, and so if your engine is what's knocking i would do an oil flush, buy Gunk's motor flush next time you change the oil, and then before you add the new oil put in lucas oil stabilizer, that stuff is the best for your engine, and then top off with some good oil (No supertech!!! that stuff is terrible). you should do all of this regardless because it's good for your engine. but also it would be good to know if your car is an OHV or an OHC, if it is an OHV then it could be your lifters knocking.

  • ?
    Lv 4
    5 years ago

    I used to have a Peugeot 106 (Shared chassis with Citroen Saxo) On my 106, as I cornered left mutually as accelerating i could hear a knocking noise, even though it replaced into below me interior the transmission tunnel! i replaced into disturbing reminiscent of you, I had each and every little thing checked, loosened and re-tightened. It nevertheless replaced into there. interior the tip, i chanced on what it replaced into whilst my spouse replaced into making use of and that i replaced into tailing tailing her, I observed the exaust shifting excessively bouncing of an exhaust mount. The screw had rusted away, even though it hovered there as though attatched, till it replaced into compelled suited by making use of turning left mutually as accelerating, then the mount dropped particularly, and knocked the exhaust! no longer something intense interior the tip, get your vehicle up on a ramp and start up vigourously shifting the exhaust factor to factor from front to returned, see no remember if it relatively is loose. sturdy success.

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